Pateick dunn and thomas haeeis



(No M5551. I 5 v r P. DUNN & T. HARRIS.

WIRE STAPLE.

No. 257,555. P55511555 May 9,1882.

7220 a: Wiinwuaa r r l5 aw y 4 c/iiiarnez UNITED STATES PATENiLQ r cn.

PATRICK DUNN AND THOMAS HARRIS, OF OQTE SAINT PAUL, QUEBEC, CANADA.

WIRE STAPLE.

SPECIFICATION forming part of Letters Patent No. 257,565, dated May 9,I882.

. Application filed Deccmber13, 1881. (No model.)

To all whom it may concern Be it known that we, PATRICK DUNN and TnonmsHARRIS, both of Cote Saint Paul, in the district of Montreal, in theProvince of Quebec, Canada, have jointly invented certain new and usefulImprovements in Wire Staples; and we do hereby declare that thefollowing is a full, clear, and exact description of the same.

The object of this invention is to make a staple of bent wire which canbe driven byan ordinary hammer without spreading the points,

thereby avoiding splitting of the wood into' which the staple isdriven.

()ur invention has reference particularly to staples for fastening theends of wooden hoops for barrels; and it consists in inwardly depressingthe head or crown of the staple, whereby the central portion will not bestruck by the workmans hammer, the force of the blow hein g carried tonearly over the legs of the staple, which are pointed, one with aninwardly-beveled cut and the other with an outwardly-beveled cut, andthe point bent inwardly.

Figure 1 is an elevation of our improved wire staple. Fig.2 is a topview of the staple as seen when fastening a hoop.

The staple consists of a wire out and bent in a machine.

In the manufacture of wire staples the head, although intended to bebent square, has a slight crown or upward curve centrally, and whichportion, in driving the staple, receives the blow or impact of anordinary flatfaced hammer, which not being adapted for driving thestaple, generally a specially-constructed hammer is used. Such staples,when driven by an ordinary hammer, spread at the points,

- therebyare hard to drive and liable to split the wood into which theyare driven. In our improved staple these objections are avoided. \Vebend the wire constituting the head of the staple with an inward ordownward curve, A, or indentation, whereby the said central portion willbe free from contact with the hammer, the result being to remove theforce or impact to nearly over the legs of the staple, whereby thetendency of the points to spread is removed. The points are formed bycutting the wire on a bevel in one direction and bending inwardly thepoint having the outward bevel, whereby an inwardly-turned point isformed to correspond to the-opposite leg, the bevel in both legsresisting the tendency to spread in driving.

The pointing of the staple-legs, whereby the bevel will be from theoutside inwardly, we consider quite important, as thereby the tendencyof the legs to spread when the staple is driven is lessened, and asaving of material is effected. If the wire were cut so that each leghad a corresponding bevel, a triangular piece of metal would be lost.

We claim as our invention- 1. As an improved article of manufacture, awire staple having the crown or head depressed or indented, as setforth, for the purpose described.

2. A wire staple having the crown or head depressed or notched, asdescribed, and the points of the legs beveled on the outside, as shown,for the purpose set forth. 7

3. A wire staple having the crown or head depressed or notched and theextremity of the legs beveled downwardly from the outer to the innerside to form a point and prevent thelegs spreading when driving.

4. A wire staple having the head or crown depressed or notched, onepoint out beveling on the ontside,and the other out parallel thereto andturned inwardly, as set forth, for the purpose described.

1?. DUNN. THOMAS HARRIS. Witnesses:

H. A. BAIN, A. BROGAN.

